TIRE LOAD AND SPEED INDEX

The TIRE LOAD INDEX is a numerical value assigned to a tire in relation to the its load bearing capability. The greater the load index number, the higher the load-bearing capability of the tire will be.

Load Index

Load (lbs)

Load (kg)

Load Index

Load (lbs)

Load (kg)

Load Index

Load (lbs)

Load (kg)

70

739

335

91

1356

615

112

2469

1120

71

761

345

92

1389

630

113

2535

1150

72

783

355

93

1433

650

114

2602

1180

73

805

365

94

1477

670

115

2679

1215

74

827

375

95

1521

690

116

2756

1250

75

853

387

96

1565

710

117

2833

1285

76

882

400

97

1609

730

118

2910

1320

77

908

412

98

1653

750

119

2998

1360

78

937

425

99

1709

775

120

3086

1400

79

963

437

100

1764

800

121

3197

1450

80

992

450

101

1819

825

122

2207

1500

81

1019

462

102

1874

850

123

3417

1550

82

1047

475

103

1929

875

124

3527

1600

83

1074

487

104

1984

900

125

3638

1650

84

1102

500

105

2039

925

126

3748

1700

85

1135

515

106

2094

950

127

3858

1750

86

1168

530

107

2149

975

128

3968

1800

87

1201

545

108

2205

1000

129

4079

1850

88

1235

560

109

2271

1030

130

4189

1900

89

1279

580

110

2337

1060

131

4299

1950

90

1323

600

111

2403

1090

132

4409

2000

SPEED INDEX, also called speed rating of a tire, is the rating it has been designed to run at and still provide performance characteristics. This is often matched to the vehicle’s speed and performance as well as the load-bearing capability based on its load index. Please note that Milestar does not recommend the use of any tire above the legal speed limit of the road the vehicle is operating on.

Speed Symbol

MPH

KPH

L

75

120

M

81

130

N

87

140

P

93

150

Q

99

160

R

106

170

S

112

180

T

118

190

U

124

200

H

130

210

V

149

240

W

168

270

Y

186

300

Z*

149+

240+

*Any tire having a maximum speed capability of greater than 149MPH may be at the tire manufacturers description assigned a Z in the tire size designation such as 245/40ZR18